18374 has 4 divisors (see below), whose sum is σ = 27564. Its totient is φ = 9186.

The previous prime is 18371. The next prime is 18379. The reversal of 18374 is 47381.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a plaindrome in base 15.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4592 + ... + 4595.

It is an arithmetic number, because the mean of its divisors is an integer number (6891).

2¹⁸³⁷⁴ is an apocalyptic number.

18374 is a deficient number, since it is larger than the sum of its proper divisors (9190).

18374 is an equidigital number, since it uses as much as digits as its factorization.

18374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9189.

The product of its digits is 672, while the sum is 23.

The square root of 18374 is about 135.5507285115. The cubic root of 18374 is about 26.3876817340.

The spelling of 18374 in words is "eighteen thousand, three hundred seventy-four".